TRIACs

A TRIAC (triode for alternating current) is a silicone semiconductor component with three terminals or legs that allow current to flow in either direction when triggered. TRIACs are a development of a similar family member the thyristor. However, unlike the thyristor which is unidirectional the TRIAC is able to control current over both halves of the sine wave making TRIACs bidirectional.
How does it work?
In basic terms a TRIAC is a low power to medium power semi-latching solid state switch. The device acts like two standard thyristors inversely connected in parallel or back to back. To activate the component a voltage needs to be applied to the gate terminal. Once the gate current is triggered a TRIAC will continue to conduct even if the supply to the gate is removed.
A TRIAC is a 4 layer silicone component that is PNPN in the positive direction and NPNP in the negative direction. The devices come in panel mount, surface mount and through hole mounting options in various package types to suit a wide variety electronics applications and circuits.
Terminals
On the TRIAC symbol there are three terminals. These terminals are,
MT1 Anode 1 (Main Terminal 1)
MT2 Anode 2 (Main Terminal 2)
Gate Terminal
Applications
TRIACs are widely used for switching and power control of AC systems. TRIACS are particularly useful in applications such as lighting dimmers as they enable the utilisation of each half-cycle of the AC wave. The solid state device can be used in a circuit as a simple on off device in a wide range of electronic applications. Some of the more common areas are,
• Temperature control
• Liquid level control
• Dimmers for domestic lighting
• Small motor control
• Speed control for electric fans
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Rincian Komponen Brand Stock Rated Average On-State Current Mounting Type Package Type Maximum Gate Trigger Current Repetitive Peak Reverse Voltage Surge Current Rating Pin Count Maximum Gate Trigger Voltage Repetitive Peak Forward Blocking Voltage Maximum Holding Current Dimensions Length Width Height Repetitive Peak Off-State Current Peak On-State Voltage Minimum Operating Temperature Maximum Operating Temperature
BTA20-700BWRG 20A, TRIAC, 3-pin, Through Hole, TO-220AB STMicroelectronics
  • S$ 2,901
  • Each (In a Tube of 50)
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STMicroelectronics 0 20A Through Hole TO-220AB - - 210A 3 - 700V 75mA 10.4 x 4.6 x 15.9mm 10.4mm 4.6mm 15.9mm - - -40 °C +125 °C
BTA20-700BWRG 20A, TRIAC, 3-pin, Through Hole, TO-220AB STMicroelectronics STMicroelectronics 0 20A Through Hole TO-220AB - - 210A 3 - 700V 75mA 10.4 x 4.6 x 15.9mm 10.4mm 4.6mm 15.9mm - - -40 °C +125 °C
BTA24-800CWRG 25A, TRIAC 50mA, 3-pin, Through Hole, TO-220AB STMicroelectronics STMicroelectronics 0 25A Through Hole TO-220AB 50mA - 260A 3 - 800V 50mA 10.4 x 4.6 x 15.9mm 10.4mm 4.6mm 15.9mm - - -40 °C +125 °C
BTA24-800CWRG 25A, TRIAC 50mA, 3-pin, Through Hole, TO-220AB STMicroelectronics
  • S$ 4,009
  • Each (In a Tube of 50)
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STMicroelectronics 0 25A Through Hole TO-220AB 50mA - 260A 3 - 800V 50mA 10.4 x 4.6 x 15.9mm 10.4mm 4.6mm 15.9mm - - -40 °C +125 °C
BTA41-700BRG 41A, TRIAC 50mA, 3-pin, Through Hole, TOP STMicroelectronics
  • S$ 9,679
  • Each (In a Tube of 30)
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STMicroelectronics 0 41A Through Hole TOP 50mA - 420A 3 - 700V 80mA 15.5 x 4.6 x 21.1mm 15.5mm 4.6mm 21.1mm - - -40 °C +125 °C
BTA41-700BRG 41A, TRIAC 50mA, 3-pin, Through Hole, TOP STMicroelectronics STMicroelectronics 0 41A Through Hole TOP 50mA - 420A 3 - 700V 80mA 15.5 x 4.6 x 21.1mm 15.5mm 4.6mm 21.1mm - - -40 °C +125 °C
BTB41-800BRG 41A, TRIAC 50mA, 3-pin, Through Hole, TOP STMicroelectronics
  • S$ 8,195
  • Each (In a Tube of 30)
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STMicroelectronics 0 41A Through Hole TOP 50mA - 420A 3 - 800V 80mA 15.5 x 4.6 x 21.1mm 15.5mm 4.6mm 21.1mm - - -40 °C +125 °C
BTB41-800BRG 41A, TRIAC 50mA, 3-pin, Through Hole, TOP STMicroelectronics STMicroelectronics 0 41A Through Hole TOP 50mA - 420A 3 - 800V 80mA 15.5 x 4.6 x 21.1mm 15.5mm 4.6mm 21.1mm - - -40 °C +125 °C
T1635H-6G-TR 16A, TRIAC, 3-pin, Surface Mount, D2PAK STMicroelectronics
  • S$ 1,891
  • Each (On a Reel of 1000)
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STMicroelectronics 0 16A Surface Mount D2PAK - - 168A 3 - 600V 35mA 10.28 x 9.35 x 4.37mm 10.28mm 9.35mm 4.37mm - - -40 °C +150 °C
T1635H-6G-TR 16A, TRIAC, 3-pin, Surface Mount, D2PAK STMicroelectronics STMicroelectronics 0 16A Surface Mount D2PAK - - 168A 3 - 600V 35mA 10.28 x 9.35 x 4.37mm 10.28mm 9.35mm 4.37mm - - -40 °C +150 °C
T2550-12I 25A, TRIAC 50mA, 3-pin, Through Hole, TO-220AB STMicroelectronics
  • S$ 4,607
  • Each (In a Tube of 50)
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STMicroelectronics 0 25A Through Hole TO-220AB 50mA - 252A 3 - 1200V 60mA 10.4 x 4.6 x 15.9mm 10.4mm 4.6mm 15.9mm - - -40 °C +125 °C
T2550-12I 25A, TRIAC 50mA, 3-pin, Through Hole, TO-220AB STMicroelectronics STMicroelectronics 0 25A Through Hole TO-220AB 50mA - 252A 3 - 1200V 60mA 10.4 x 4.6 x 15.9mm 10.4mm 4.6mm 15.9mm - - -40 °C +125 °C
T3050H-6T 30A, TRIAC, 3-pin, Through Hole, TO-220AB STMicroelectronics STMicroelectronics 0 30A Through Hole TO-220AB - - 284A 3 - 600V 75mA 10.4 x 4.6 x 15.9mm 10.4mm 4.6mm 15.9mm - - -40 °C +150 °C
T3050H-6T 30A, TRIAC, 3-pin, Through Hole, TO-220AB STMicroelectronics
  • S$ 4,607
  • Each (In a Tube of 50)
  • Compare
STMicroelectronics 0 30A Through Hole TO-220AB - - 284A 3 - 600V 75mA 10.4 x 4.6 x 15.9mm 10.4mm 4.6mm 15.9mm - - -40 °C +150 °C
Z0103NN5AA4 1A, TRIAC 25mA, 4-pin, Surface Mount, SOT-223 STMicroelectronics
  • S$ 0,408
  • Each (On a Reel of 1000)
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STMicroelectronics 0 1A Surface Mount SOT-223 25mA - 8.5A 4 - 800V 7mA 6.7 x 3.7 x 1.8mm 6.7mm 3.7mm 1.8mm - - -40 °C +125 °C
Z0103NN5AA4 1A, TRIAC 25mA, 4-pin, Surface Mount, SOT-223 STMicroelectronics STMicroelectronics 0 1A Surface Mount SOT-223 25mA - 8.5A 4 - 800V 7mA 6.7 x 3.7 x 1.8mm 6.7mm 3.7mm 1.8mm - - -40 °C +125 °C
Z0107NN 5AA4 1A, TRIAC 25mA, 4-pin, Surface Mount, SOT-223 STMicroelectronics
  • S$ 0,576
  • Each (On a Reel of 1000)
  • Compare
STMicroelectronics 0 1A Surface Mount SOT-223 25mA - 8.5A 4 - 800V 10mA 6.7 x 3.7 x 1.8mm 6.7mm 3.7mm 1.8mm - - -40 °C +125 °C
Z0107NN 5AA4 1A, TRIAC 25mA, 4-pin, Surface Mount, SOT-223 STMicroelectronics STMicroelectronics 0 1A Surface Mount SOT-223 25mA - 8.5A 4 - 800V 10mA 6.7 x 3.7 x 1.8mm 6.7mm 3.7mm 1.8mm - - -40 °C +125 °C
VOM3052T, 6V, TRIAC 10mA, 4-pin, Surface Mount, SOP Vishay
  • S$ 0,642
  • Each (On a Reel of 2000)
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Vishay 3590 - Surface Mount SOP 10mA 6V 0.5A 4 - 600V 0.3mA 4.57 x 4.42 x 1.97mm 4.57mm 4.42mm 1.97mm 100nA 3V -40 °C +100 °C
VO3062, 6V, TRIAC, Gate Trigger 22V 10mA, 6-pin, Through Hole, DIP Vishay
  • S$ 1,537
  • Each (In a Tube of 50)
  • Compare
Vishay 1990 - Through Hole DIP 10mA 6V 1 (Non-Reptitive)A 6 22V 600V - 9 x 6.4 x 3.5mm 9mm 6.4mm 3.5mm 500nA 3V -55 °C +100 °C
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